Quote:
Originally Posted by twowheels
But why? Why do you care to wait so long to charge it? Just stick it on the charger now and then when it's near 40% or so...
Why 40%?
http://batteryuniversity.com/learn/a...ased_batteries
Look at the Depth of discharge table. Discharging 100% only gives 300-500 cycles whereas discharging 50% gives 1,200 – 1,500 cycles, which is what hawhill was getting at. |
You are correct. My NowBible User Guide says that Lithium batteries last for about 500 FULL charges. Obviously, less than full charges will have a higher number.
Frankly, I'm running this Cumulative Time Session test for my own enjoyment on the Paperwhite. Its the same reason I use my GSam Battery Monitor on my Kindle Fire 1st Gen. I am curious about these batteries and enjoy investigating how the battery charges get used.
Most folks probably could forget the entire exercise since most of us will be replacing our eReaders due to obsolescence, not battery death. For example, as soon as I get my 32 Gb Fire HD 7", I'll move all my eBooks and apps to it from the Fire 1st Gen and give away the latter device to my daughter. It only lasted 11 MONTHS and is still in fine shape. I just wanted the newest toy.
Actually, I keep records on ALL my device batteries in the same Excel Book on different spreadsheets. Its just another hobby of mine.
I find it fascinating that on my Kindle Fire 1st Gen WiFi operates MORE hours than Screen activity but uses only 1.7% of battery energy versus 86.1% for the Screen usage. The Kindle app there only uses 3.1% of battery energy but is my predominant use on that device. If someone ever offers for sale an active content utility to measure battery usage on the PW, I'd definitely be one of their first customers.